Ask HN: Good resources about how to do risk analysis for transactional lending

Hello Hacker fam, I'm currently bootstrapping my own venture where we're building "Embedded financing solutions for B2B marketplaces" with two other co-founders(one of whom worked for Amazon business).

What does it mean?

We believe that vertical B2B marketplaces like MetalsHub, Chemondis, Peskyfish etc. are on the rise and the only thing stopping them from completely overshadowing Amazon business is the "Embedded finance" part.

We want to provide business buyers with Buy now, Pay Later solutions just like how Klarna provides it for B2C marketplaces.

For this we need underwrite the risks involved in the transaction, the seller, the buyer. Furthermore, we believe that traditional lending models based on the relationship with the bank are fundamentally flawed in terms of scalability & distribution. We want to take a different approach it via the transactional lending model.

Any resources/blogs/courses related to transactional lending and trade finance is highly appreciated.

P.S: I'm asking because I've exhausted all my resources that I could find on the google and was hoping some of you can help.